sys/dev/twa/tw_osl_cam.c

   1 /*
   2  * Copyright (c) 2004-07 Applied Micro Circuits Corporation.
   3  * Copyright (c) 2004-05 Vinod Kashyap.
   4  * All rights reserved.
   5  *
   6  * Redistribution and use in source and binary forms, with or without
   7  * modification, are permitted provided that the following conditions
   8  * are met:
   9  * 1. Redistributions of source code must retain the above copyright
  10  *    notice, this list of conditions and the following disclaimer.
  11  * 2. Redistributions in binary form must reproduce the above copyright
  12  *    notice, this list of conditions and the following disclaimer in the
  13  *    documentation and/or other materials provided with the distribution.
  14  *
  15  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
  16  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  17  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  18  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  19  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  20  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  21  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  22  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  23  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  24  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  25  * SUCH DAMAGE.
  26  *
  27  *      $FreeBSD$
  28  */
  29
  30 /*
  31  * AMCC'S 3ware driver for 9000 series storage controllers.
  32  *
  33  * Author: Vinod Kashyap
  34  * Modifications by: Adam Radford
  35  * Modifications by: Manjunath Ranganathaiah
  36  */
  37
  38
  39 /*
  40  * FreeBSD CAM related functions.
  41  */
  42
  43
  44 #include <dev/twa/tw_osl_includes.h>
  45
  46 #include <cam/cam.h>
  47 #include <cam/cam_ccb.h>
  48 #include <cam/cam_sim.h>
  49 #include <cam/cam_xpt_sim.h>
  50 #include <cam/cam_debug.h>
  51 #include <cam/cam_periph.h>
  52
  53 #include <cam/scsi/scsi_all.h>
  54 #include <cam/scsi/scsi_message.h>
  55
  56 static TW_VOID  twa_action(struct cam_sim *sim, union ccb *ccb);
  57 static TW_VOID  twa_poll(struct cam_sim *sim);
  58
  59 static TW_INT32 tw_osli_execute_scsi(struct tw_osli_req_context *req,
  60         union ccb *ccb);
  61
  62
  63
  64 /*
  65  * Function name:       tw_osli_cam_attach
  66  * Description:         Attaches the driver to CAM.
  67  *
  68  * Input:               sc      -- ptr to OSL internal ctlr context
  69  * Output:              None
  70  * Return value:        0       -- success
  71  *                      non-zero-- failure
  72  */
  73 TW_INT32
  74 tw_osli_cam_attach(struct twa_softc *sc)
  75 {
  76         struct cam_devq         *devq;
  77
  78         tw_osli_dbg_dprintf(3, sc, "entered");
  79
  80         /*
  81          * Create the device queue for our SIM.
  82          */
  83         if ((devq = cam_simq_alloc(TW_OSLI_MAX_NUM_IOS)) == NULL) {
  84                 tw_osli_printf(sc, "error = %d",
  85                         TW_CL_SEVERITY_ERROR_STRING,
  86                         TW_CL_MESSAGE_SOURCE_FREEBSD_DRIVER,
  87                         0x2100,
  88                         "Failed to create SIM device queue",
  89                         ENOMEM);
  90                 return(ENOMEM);
  91         }
  92
  93         /*
  94          * Create a SIM entry.  Though we can support TW_OSLI_MAX_NUM_REQUESTS
  95          * simultaneous requests, we claim to be able to handle only
  96          * TW_OSLI_MAX_NUM_IOS (two less), so that we always have a request
  97          * packet available to service ioctls and AENs.
  98          */
  99         tw_osli_dbg_dprintf(3, sc, "Calling cam_sim_alloc");
 100         sc->sim = cam_sim_alloc(twa_action, twa_poll, "twa", sc,
 101                         device_get_unit(sc->bus_dev), sc->sim_lock,
 102                         TW_OSLI_MAX_NUM_IOS, 1, devq);
 103         if (sc->sim == NULL) {
 104                 cam_simq_free(devq);
 105                 tw_osli_printf(sc, "error = %d",
 106                         TW_CL_SEVERITY_ERROR_STRING,
 107                         TW_CL_MESSAGE_SOURCE_FREEBSD_DRIVER,
 108                         0x2101,
 109                         "Failed to create a SIM entry",
 110                         ENOMEM);
 111                 return(ENOMEM);
 112         }
 113
 114         /*
 115          * Register the bus.
 116          */
 117         tw_osli_dbg_dprintf(3, sc, "Calling xpt_bus_register");
 118         mtx_lock(sc->sim_lock);
 119         if (xpt_bus_register(sc->sim, sc->bus_dev, 0) != CAM_SUCCESS) {
 120                 cam_sim_free(sc->sim, TRUE);
 121                 sc->sim = NULL; /* so cam_detach will not try to free it */
 122                 tw_osli_printf(sc, "error = %d",
 123                         TW_CL_SEVERITY_ERROR_STRING,
 124                         TW_CL_MESSAGE_SOURCE_FREEBSD_DRIVER,
 125                         0x2102,
 126                         "Failed to register the bus",
 127                         ENXIO);
 128                 mtx_unlock(sc->sim_lock);
 129                 return(ENXIO);
 130         }
 131
 132         tw_osli_dbg_dprintf(3, sc, "Calling xpt_create_path");
 133         if (xpt_create_path(&sc->path, NULL,
 134                                 cam_sim_path(sc->sim),
 135                                 CAM_TARGET_WILDCARD,
 136                                 CAM_LUN_WILDCARD) != CAM_REQ_CMP) {
 137                 xpt_bus_deregister(cam_sim_path (sc->sim));
 138                 /* Passing TRUE to cam_sim_free will free the devq as well. */
 139                 cam_sim_free(sc->sim, TRUE);
 140                 tw_osli_printf(sc, "error = %d",
 141                         TW_CL_SEVERITY_ERROR_STRING,
 142                         TW_CL_MESSAGE_SOURCE_FREEBSD_DRIVER,
 143                         0x2103,
 144                         "Failed to create path",
 145                         ENXIO);
 146                 mtx_unlock(sc->sim_lock);
 147                 return(ENXIO);
 148         }
 149         mtx_unlock(sc->sim_lock);
 150
 151         tw_osli_dbg_dprintf(3, sc, "exiting");
 152         return(0);
 153 }
 154
 155
 156
 157 /*
 158  * Function name:       tw_osli_cam_detach
 159  * Description:         Detaches the driver from CAM.
 160  *
 161  * Input:               sc      -- ptr to OSL internal ctlr context
 162  * Output:              None
 163  * Return value:        None
 164  */
 165 TW_VOID
 166 tw_osli_cam_detach(struct twa_softc *sc)
 167 {
 168         tw_osli_dbg_dprintf(3, sc, "entered");
 169
 170         mtx_lock(sc->sim_lock);
 171
 172         if (sc->path)
 173                 xpt_free_path(sc->path);
 174         if (sc->sim) {
 175                 xpt_bus_deregister(cam_sim_path(sc->sim));
 176                 /* Passing TRUE to cam_sim_free will free the devq as well. */
 177                 cam_sim_free(sc->sim, TRUE);
 178         }
 179         /* It's ok have 1 hold count while destroying the mutex */
 180         mtx_destroy(sc->sim_lock);
 181 }
 182
 183
 184
 185 /*
 186  * Function name:       tw_osli_execute_scsi
 187  * Description:         Build a fw cmd, based on a CAM style ccb, and
 188  *                      send it down.
 189  *
 190  * Input:               req     -- ptr to OSL internal request context
 191  *                      ccb     -- ptr to CAM style ccb
 192  * Output:              None
 193  * Return value:        0       -- success
 194  *                      non-zero-- failure
 195  */
 196 TW_INT32
 197 tw_osli_execute_scsi(struct tw_osli_req_context *req, union ccb *ccb)
 198 {
 199         struct twa_softc                *sc = req->ctlr;
 200         struct tw_cl_req_packet         *req_pkt;
 201         struct tw_cl_scsi_req_packet    *scsi_req;
 202         struct ccb_hdr                  *ccb_h = &(ccb->ccb_h);
 203         struct ccb_scsiio               *csio = &(ccb->csio);
 204         TW_INT32                        error;
 205
 206         tw_osli_dbg_dprintf(10, sc, "SCSI I/O request 0x%x",
 207                 csio->cdb_io.cdb_bytes[0]);
 208
 209         if (ccb_h->target_id >= TW_CL_MAX_NUM_UNITS) {
 210                 tw_osli_dbg_dprintf(3, sc, "Invalid target. PTL = %x %x %x",
 211                         ccb_h->path_id, ccb_h->target_id, ccb_h->target_lun);
 212                 ccb_h->status |= CAM_TID_INVALID;
 213                 xpt_done(ccb);
 214                 return(1);
 215         }
 216         if (ccb_h->target_lun >= TW_CL_MAX_NUM_LUNS) {
 217                 tw_osli_dbg_dprintf(3, sc, "Invalid lun. PTL = %x %x %x",
 218                         ccb_h->path_id, ccb_h->target_id, ccb_h->target_lun);
 219                 ccb_h->status |= CAM_LUN_INVALID;
 220                 xpt_done(ccb);
 221                 return(1);
 222         }
 223
 224         if(ccb_h->flags & CAM_CDB_PHYS) {
 225                 tw_osli_printf(sc, "",
 226                         TW_CL_SEVERITY_ERROR_STRING,
 227                         TW_CL_MESSAGE_SOURCE_FREEBSD_DRIVER,
 228                         0x2105,
 229                         "Physical CDB address!");
 230                 ccb_h->status = CAM_REQ_INVALID;
 231                 xpt_done(ccb);
 232                 return(1);
 233         }
 234
 235         /*
 236          * We are going to work on this request.  Mark it as enqueued (though
 237          * we don't actually queue it...)
 238          */
 239         ccb_h->status |= CAM_SIM_QUEUED;
 240
 241         if((ccb_h->flags & CAM_DIR_MASK) != CAM_DIR_NONE) {
 242                 if(ccb_h->flags & CAM_DIR_IN)
 243                         req->flags |= TW_OSLI_REQ_FLAGS_DATA_IN;
 244                 else
 245                         req->flags |= TW_OSLI_REQ_FLAGS_DATA_OUT;
 246         }
 247
 248         /* Build the CL understood request packet for SCSI cmds. */
 249         req_pkt = &req->req_pkt;
 250         req_pkt->status = 0;
 251         req_pkt->tw_osl_callback = tw_osl_complete_io;
 252         scsi_req = &(req_pkt->gen_req_pkt.scsi_req);
 253         scsi_req->unit = ccb_h->target_id;
 254         scsi_req->lun = ccb_h->target_lun;
 255         scsi_req->sense_len = 0;
 256         scsi_req->sense_data = (TW_UINT8 *)(&csio->sense_data);
 257         scsi_req->scsi_status = 0;
 258         if(ccb_h->flags & CAM_CDB_POINTER)
 259                 scsi_req->cdb = csio->cdb_io.cdb_ptr;
 260         else
 261                 scsi_req->cdb = csio->cdb_io.cdb_bytes;
 262         scsi_req->cdb_len = csio->cdb_len;
 263
 264         if (csio->dxfer_len > TW_CL_MAX_IO_SIZE) {
 265                 tw_osli_printf(sc, "size = %d",
 266                         TW_CL_SEVERITY_ERROR_STRING,
 267                         TW_CL_MESSAGE_SOURCE_FREEBSD_DRIVER,
 268                         0x2106,
 269                         "I/O size too big",
 270                         csio->dxfer_len);
 271                 ccb_h->status = CAM_REQ_TOO_BIG;
 272                 ccb_h->status &= ~CAM_SIM_QUEUED;
 273                 xpt_done(ccb);
 274                 return(1);
 275         }
 276         if ((ccb_h->flags & CAM_DATA_MASK) == CAM_DATA_VADDR) {
 277                 if ((req->length = csio->dxfer_len) != 0) {
 278                         req->data = csio->data_ptr;
 279                         scsi_req->sgl_entries = 1;
 280                 }
 281         } else
 282                 req->flags |= TW_OSLI_REQ_FLAGS_CCB;
 283         req->deadline = tw_osl_get_local_time() + (ccb_h->timeout / 1000);
 284
 285         /*
 286          * twa_map_load_data_callback will fill in the SGL,
 287          * and submit the I/O.
 288          */
 289         error = tw_osli_map_request(req);
 290         if ((error) && (req->flags & TW_OSLI_REQ_FLAGS_FAILED)) {
 291                 req->deadline = 0;
 292                 ccb_h->status = CAM_REQ_CMP_ERR;
 293                 ccb_h->status &= ~CAM_SIM_QUEUED;
 294                 xpt_done(ccb);
 295         }
 296         return(error);
 297 }
 298
 299
 300
 301 /*
 302  * Function name:       twa_action
 303  * Description:         Driver entry point for CAM's use.
 304  *
 305  * Input:               sim     -- sim corresponding to the ctlr
 306  *                      ccb     -- ptr to CAM request
 307  * Output:              None
 308  * Return value:        None
 309  */
 310 TW_VOID
 311 twa_action(struct cam_sim *sim, union ccb *ccb)
 312 {
 313         struct twa_softc        *sc = (struct twa_softc *)cam_sim_softc(sim);
 314         struct ccb_hdr          *ccb_h = &(ccb->ccb_h);
 315
 316         switch (ccb_h->func_code) {
 317         case XPT_SCSI_IO:       /* SCSI I/O */
 318         {
 319                 struct tw_osli_req_context      *req;
 320
 321                 req = tw_osli_get_request(sc);
 322                 if (req == NULL) {
 323                         tw_osli_dbg_dprintf(2, sc, "Cannot get request pkt.");
 324                         /*
 325                          * Freeze the simq to maintain ccb ordering.  The next
 326                          * ccb that gets completed will unfreeze the simq.
 327                          */
 328                         ccb_h->status &= ~CAM_SIM_QUEUED;
 329                         ccb_h->status |= CAM_REQUEUE_REQ;
 330                         xpt_done(ccb);
 331                         break;
 332                 }
 333
 334                 if ((tw_cl_is_reset_needed(&(req->ctlr->ctlr_handle)))) {
 335                         ccb_h->status &= ~CAM_SIM_QUEUED;
 336                         ccb_h->status |= CAM_REQUEUE_REQ;
 337                         xpt_done(ccb);
 338                         tw_osli_req_q_insert_tail(req, TW_OSLI_FREE_Q);
 339                         break;
 340                 }
 341
 342                 req->req_handle.osl_req_ctxt = req;
 343                 req->req_handle.is_io = TW_CL_TRUE;
 344                 req->orig_req = ccb;
 345                 if (tw_osli_execute_scsi(req, ccb))
 346                         tw_osli_req_q_insert_tail(req, TW_OSLI_FREE_Q);
 347                 break;
 348         }
 349
 350         case XPT_ABORT:
 351                 tw_osli_dbg_dprintf(2, sc, "Abort request.");
 352                 ccb_h->status = CAM_UA_ABORT;
 353                 xpt_done(ccb);
 354                 break;
 355
 356         case XPT_RESET_BUS:
 357                 tw_cl_create_event(&(sc->ctlr_handle), TW_CL_FALSE,
 358                         TW_CL_MESSAGE_SOURCE_FREEBSD_DRIVER,
 359                         0x2108, 0x3, TW_CL_SEVERITY_INFO_STRING,
 360                         "Received Reset Bus request from CAM",
 361                         " ");
 362
 363                 tw_cl_set_reset_needed(&(sc->ctlr_handle));
 364                 ccb_h->status = CAM_REQ_CMP;
 365                 xpt_done(ccb);
 366                 break;
 367
 368         case XPT_SET_TRAN_SETTINGS:
 369                 tw_osli_dbg_dprintf(3, sc, "XPT_SET_TRAN_SETTINGS");
 370
 371                 /*
 372                  * This command is not supported, since it's very specific
 373                  * to SCSI, and we are doing ATA.
 374                  */
 375                 ccb_h->status = CAM_FUNC_NOTAVAIL;
 376                 xpt_done(ccb);
 377                 break;
 378
 379         case XPT_GET_TRAN_SETTINGS:
 380         {
 381                 struct ccb_trans_settings       *cts = &ccb->cts;
 382                 struct ccb_trans_settings_scsi *scsi =
 383                     &cts->proto_specific.scsi;
 384                 struct ccb_trans_settings_spi *spi =
 385                     &cts->xport_specific.spi;
 386
 387                 cts->protocol = PROTO_SCSI;
 388                 cts->protocol_version = SCSI_REV_2;
 389                 cts->transport = XPORT_SPI;
 390                 cts->transport_version = 2;
 391
 392                 spi->valid = CTS_SPI_VALID_DISC;
 393                 spi->flags = CTS_SPI_FLAGS_DISC_ENB;
 394                 scsi->valid = CTS_SCSI_VALID_TQ;
 395                 scsi->flags = CTS_SCSI_FLAGS_TAG_ENB;
 396                 tw_osli_dbg_dprintf(3, sc, "XPT_GET_TRAN_SETTINGS");
 397                 ccb_h->status = CAM_REQ_CMP;
 398                 xpt_done(ccb);
 399                 break;
 400         }
 401
 402         case XPT_CALC_GEOMETRY:
 403                 tw_osli_dbg_dprintf(3, sc, "XPT_CALC_GEOMETRY");
 404                 cam_calc_geometry(&ccb->ccg, 1/* extended */);
 405                 xpt_done(ccb);
 406                 break;
 407
 408         case XPT_PATH_INQ:    /* Path inquiry -- get twa properties */
 409         {
 410                 struct ccb_pathinq      *path_inq = &ccb->cpi;
 411
 412                 tw_osli_dbg_dprintf(3, sc, "XPT_PATH_INQ request");
 413
 414                 path_inq->version_num = 1;
 415                 path_inq->hba_inquiry = 0;
 416                 path_inq->target_sprt = 0;
 417                 path_inq->hba_misc = 0;
 418                 path_inq->hba_eng_cnt = 0;
 419                 path_inq->max_target = TW_CL_MAX_NUM_UNITS;
 420                 path_inq->max_lun = TW_CL_MAX_NUM_LUNS - 1;
 421                 path_inq->unit_number = cam_sim_unit(sim);
 422                 path_inq->bus_id = cam_sim_bus(sim);
 423                 path_inq->initiator_id = TW_CL_MAX_NUM_UNITS;
 424                 path_inq->base_transfer_speed = 100000;
 425                 strncpy(path_inq->sim_vid, "FreeBSD", SIM_IDLEN);
 426                 strncpy(path_inq->hba_vid, "3ware", HBA_IDLEN);
 427                 strncpy(path_inq->dev_name, cam_sim_name(sim), DEV_IDLEN);
 428                 path_inq->transport = XPORT_SPI;
 429                 path_inq->transport_version = 2;
 430                 path_inq->protocol = PROTO_SCSI;
 431                 path_inq->protocol_version = SCSI_REV_2;
 432                 path_inq->maxio = TW_CL_MAX_IO_SIZE;
 433                 ccb_h->status = CAM_REQ_CMP;
 434                 xpt_done(ccb);
 435                 break;
 436         }
 437
 438         default:
 439                 tw_osli_dbg_dprintf(3, sc, "func_code = %x", ccb_h->func_code);
 440                 ccb_h->status = CAM_REQ_INVALID;
 441                 xpt_done(ccb);
 442                 break;
 443         }
 444 }
 445
 446
 447
 448 /*
 449  * Function name:       twa_poll
 450  * Description:         Driver entry point called when interrupts are not
 451  *                      available.
 452  *
 453  * Input:               sim     -- sim corresponding to the controller
 454  * Output:              None
 455  * Return value:        None
 456  */
 457 TW_VOID
 458 twa_poll(struct cam_sim *sim)
 459 {
 460         struct twa_softc *sc = (struct twa_softc *)(cam_sim_softc(sim));
 461
 462         tw_osli_dbg_dprintf(3, sc, "entering; sc = %p", sc);
 463         tw_cl_interrupt(&(sc->ctlr_handle));
 464         tw_osli_dbg_dprintf(3, sc, "exiting; sc = %p", sc);
 465 }
 466
 467
 468
 469 /*
 470  * Function name:       tw_osli_request_bus_scan
 471  * Description:         Requests CAM for a scan of the bus.
 472  *
 473  * Input:               sc      -- ptr to per ctlr structure
 474  * Output:              None
 475  * Return value:        0       -- success
 476  *                      non-zero-- failure
 477  */
 478 TW_INT32
 479 tw_osli_request_bus_scan(struct twa_softc *sc)
 480 {
 481         union ccb       *ccb;
 482
 483         tw_osli_dbg_dprintf(3, sc, "entering");
 484
 485         /* If we get here before sc->sim is initialized, return an error. */
 486         if (!(sc->sim))
 487                 return(ENXIO);
 488         if ((ccb = xpt_alloc_ccb()) == NULL)
 489                 return(ENOMEM);
 490         mtx_lock(sc->sim_lock);
 491         if (xpt_create_path(&ccb->ccb_h.path, NULL, cam_sim_path(sc->sim),
 492             CAM_TARGET_WILDCARD, CAM_LUN_WILDCARD) != CAM_REQ_CMP) {
 493                 xpt_free_ccb(ccb);
 494                 mtx_unlock(sc->sim_lock);
 495                 return(EIO);
 496         }
 497
 498         xpt_rescan(ccb);
 499         mtx_unlock(sc->sim_lock);
 500         return(0);
 501 }
 502
 503
 504
 505 /*
 506  * Function name:       tw_osli_disallow_new_requests
 507  * Description:         Calls the appropriate CAM function, so as to freeze
 508  *                      the flow of new requests from CAM to this controller.
 509  *
 510  * Input:               sc      -- ptr to OSL internal ctlr context
 511  *                      req_handle -- ptr to request handle sent by OSL.
 512  * Output:              None
 513  * Return value:        None
 514  */
 515 TW_VOID
 516 tw_osli_disallow_new_requests(struct twa_softc *sc,
 517         struct tw_cl_req_handle *req_handle)
 518 {
 519         /* Only freeze/release the simq for IOs */
 520         if (req_handle->is_io) {
 521                 struct tw_osli_req_context      *req = req_handle->osl_req_ctxt;
 522                 union ccb                       *ccb = (union ccb *)(req->orig_req);
 523
 524                 xpt_freeze_simq(sc->sim, 1);
 525                 ccb->ccb_h.status |= CAM_RELEASE_SIMQ;
 526         }
 527 }
 528
 529
 530
 531 /*
 532  * Function name:       tw_osl_timeout
 533  * Description:         Call to timeout().
 534  *
 535  * Input:               req_handle -- ptr to request handle sent by OSL.
 536  * Output:              None
 537  * Return value:        None
 538  */
 539 TW_VOID
 540 tw_osl_timeout(struct tw_cl_req_handle *req_handle)
 541 {
 542         struct tw_osli_req_context      *req = req_handle->osl_req_ctxt;
 543         union ccb                       *ccb = (union ccb *)(req->orig_req);
 544         struct ccb_hdr                  *ccb_h = &(ccb->ccb_h);
 545
 546         req->deadline = tw_osl_get_local_time() + (ccb_h->timeout / 1000);
 547 }
 548
 549
 550
 551 /*
 552  * Function name:       tw_osl_untimeout
 553  * Description:         Inverse of call to timeout().
 554  *
 555  * Input:               req_handle -- ptr to request handle sent by OSL.
 556  * Output:              None
 557  * Return value:        None
 558  */
 559 TW_VOID
 560 tw_osl_untimeout(struct tw_cl_req_handle *req_handle)
 561 {
 562         struct tw_osli_req_context      *req = req_handle->osl_req_ctxt;
 563
 564         req->deadline = 0;
 565 }
 566
 567
 568
 569 /*
 570  * Function name:       tw_osl_scan_bus
 571  * Description:         CL calls this function to request for a bus scan.
 572  *
 573  * Input:               ctlr_handle     -- ptr to controller handle
 574  * Output:              None
 575  * Return value:        None
 576  */
 577 TW_VOID
 578 tw_osl_scan_bus(struct tw_cl_ctlr_handle *ctlr_handle)
 579 {
 580         struct twa_softc        *sc = ctlr_handle->osl_ctlr_ctxt;
 581         TW_INT32                error;
 582
 583         if ((error = tw_osli_request_bus_scan(sc)))
 584                 tw_osli_printf(sc, "error = %d",
 585                         TW_CL_SEVERITY_ERROR_STRING,
 586                         TW_CL_MESSAGE_SOURCE_FREEBSD_DRIVER,
 587                         0x2109,
 588                         "Bus scan request to CAM failed",
 589                         error);
 590 }
 591
 592
 593
 594 /*
 595  * Function name:       tw_osl_complete_io
 596  * Description:         Called to complete CAM scsi requests.
 597  *
 598  * Input:               req_handle      -- ptr to request handle
 599  * Output:              None
 600  * Return value:        None
 601  */
 602 TW_VOID
 603 tw_osl_complete_io(struct tw_cl_req_handle *req_handle)
 604 {
 605         struct tw_osli_req_context      *req = req_handle->osl_req_ctxt;
 606         struct tw_cl_req_packet         *req_pkt =
 607                 (struct tw_cl_req_packet *)(&req->req_pkt);
 608         struct tw_cl_scsi_req_packet    *scsi_req;
 609         struct twa_softc                *sc = req->ctlr;
 610         union ccb                       *ccb = (union ccb *)(req->orig_req);
 611
 612         tw_osli_dbg_dprintf(10, sc, "entering");
 613
 614         if (req->state != TW_OSLI_REQ_STATE_BUSY)
 615                 tw_osli_printf(sc, "request = %p, status = %d",
 616                         TW_CL_SEVERITY_ERROR_STRING,
 617                         TW_CL_MESSAGE_SOURCE_FREEBSD_DRIVER,
 618                         0x210A,
 619                         "Unposted command completed!!",
 620                         req, req->state);
 621
 622         /*
 623          * Remove request from the busy queue.  Just mark it complete.
 624          * There's no need to move it into the complete queue as we are
 625          * going to be done with it right now.
 626          */
 627         req->state = TW_OSLI_REQ_STATE_COMPLETE;
 628         tw_osli_req_q_remove_item(req, TW_OSLI_BUSY_Q);
 629
 630         tw_osli_unmap_request(req);
 631
 632         req->deadline = 0;
 633         if (req->error_code) {
 634                 /* This request never got submitted to the firmware. */
 635                 if (req->error_code == EBUSY) {
 636                         /*
 637                          * Cmd queue is full, or the Common Layer is out of
 638                          * resources.  The simq will already have been frozen.
 639                          * When this ccb gets completed will unfreeze the simq.
 640                          */
 641                         ccb->ccb_h.status |= CAM_REQUEUE_REQ;
 642                 }
 643                 else if (req->error_code == EFBIG)
 644                         ccb->ccb_h.status = CAM_REQ_TOO_BIG;
 645                 else
 646                         ccb->ccb_h.status = CAM_REQ_CMP_ERR;
 647         } else {
 648                 scsi_req = &(req_pkt->gen_req_pkt.scsi_req);
 649                 if (req_pkt->status == TW_CL_ERR_REQ_SUCCESS)
 650                         ccb->ccb_h.status = CAM_REQ_CMP;
 651                 else {
 652                         if (req_pkt->status & TW_CL_ERR_REQ_INVALID_TARGET)
 653                                 ccb->ccb_h.status |= CAM_SEL_TIMEOUT;
 654                         else if (req_pkt->status & TW_CL_ERR_REQ_INVALID_LUN)
 655                                 ccb->ccb_h.status |= CAM_DEV_NOT_THERE;
 656                         else if (req_pkt->status & TW_CL_ERR_REQ_SCSI_ERROR)
 657                                 ccb->ccb_h.status |= CAM_SCSI_STATUS_ERROR;
 658                         else if (req_pkt->status & TW_CL_ERR_REQ_BUS_RESET)
 659                                 ccb->ccb_h.status |= (CAM_REQUEUE_REQ | CAM_SCSI_BUS_RESET);
 660                         /*
 661                          * If none of the above errors occurred, simply
 662                          * mark completion error.
 663                          */
 664                         if (ccb->ccb_h.status == 0)
 665                                 ccb->ccb_h.status = CAM_REQ_CMP_ERR;
 666
 667                         if (req_pkt->status & TW_CL_ERR_REQ_AUTO_SENSE_VALID) {
 668                                 ccb->csio.sense_len = scsi_req->sense_len;
 669                                 ccb->ccb_h.status |= CAM_AUTOSNS_VALID;
 670                         }
 671                 }
 672
 673                 ccb->csio.scsi_status = scsi_req->scsi_status;
 674         }
 675
 676         ccb->ccb_h.status &= ~CAM_SIM_QUEUED;
 677         mtx_lock(sc->sim_lock);
 678         xpt_done(ccb);
 679         mtx_unlock(sc->sim_lock);
 680         if (! req->error_code)
 681                  /* twa_action will free the request otherwise */
 682                 tw_osli_req_q_insert_tail(req, TW_OSLI_FREE_Q);
 683 }
 684